目前很多院校都开设有光电效应实验,并把用距离平方反比关系验证光电效应第一定律作为该实验的内容之一。查一下流行的一些实验讲义,可以看出对这个问题的叙述基本上来源于苏联的“物理实验”和“物理实验指南”二书。该书认为“将小灯当作点光源,则可以认为,阴极面上的照度(应改为光通量)与小灯和光电管(应改为光电阴极)间的距离之平方成反比”如果用a表 At present, many colleges and universities have opened a photoelectric effect experiment, and the inverse square distance relationship to verify the first law of photoelectric effect as one of the contents of the experiment. A look at some of the popular laboratory handouts shows that the description of this issue is essentially based on the two books of the Soviet Union’s “Physics Experiment” and “Physics Experiment Guide.” The book considered “the small light as a point light source, you can think of the cathode surface illumination (should be changed to luminous flux) and the small lamp and the photocell (should be changed to photocathode) is inversely proportional to the square of the distance between” If a table